<?php

/**
 * Smarty Internal Plugin Compile Block
 *
 * Compiles the {block}{/block} tags
 *
 * @package    Smarty
 * @subpackage Compiler
 * @author     Uwe Tews
 */

/**
 * Smarty Internal Plugin Compile Block Class
 *
 * @package    Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Block extends Smarty_Internal_CompileBase {

	/**
	 * Attribute definition: Overwrites base class.
	 *
	 * @var array
	 * @see Smarty_Internal_CompileBase
	 */
	public $required_attributes = array('name');

	/**
	 * Attribute definition: Overwrites base class.
	 *
	 * @var array
	 * @see Smarty_Internal_CompileBase
	 */
	public $shorttag_order = array('name', 'hide');

	/**
	 * Attribute definition: Overwrites base class.
	 *
	 * @var array
	 * @see Smarty_Internal_CompileBase
	 */
	public $optional_attributes = array('hide');

	/**
	 * Compiles code for the {block} tag
	 *
	 * @param array  $args     array with attributes from parser
	 * @param object $compiler compiler object
	 *
	 * @return boolean true
	 */
	public function compile($args, $compiler) {
		// check and get attributes
		$_attr = $this->getAttributes($compiler, $args);
		$save = array(
				$_attr,
				$compiler->parser->current_buffer,
				$compiler->nocache,
				$compiler->smarty->merge_compiled_includes,
				$compiler->merged_templates,
				$compiler->smarty->merged_templates_func,
				$compiler->template->properties,
				$compiler->template->has_nocache_code
		);
		$this->openTag($compiler, 'block', $save);
		if ($_attr['nocache'] == true)
		{
			$compiler->nocache = true;
		}
		// set flag for {block} tag
		$compiler->inheritance = true;
		// must merge includes
		$compiler->smarty->merge_compiled_includes = true;

		$compiler->parser->current_buffer = new _smarty_template_buffer($compiler->parser);
		$compiler->has_code = false;

		return true;
	}

	/**
	 * Save or replace child block source by block name during parsing
	 *
	 * @param string $block_content block source content
	 * @param string $block_tag     opening block tag
	 * @param object $template      template object
	 * @param string $filepath      filepath of template source
	 */
	public static function saveBlockData($block_content, $block_tag, $template, $filepath) {
		$_rdl = preg_quote($template->smarty->right_delimiter);
		$_ldl = preg_quote($template->smarty->left_delimiter);
		if (!$template->smarty->auto_literal)
		{
			$al = '\s*';
		}
		else
		{
			$al = '';
		}
		if (0 == preg_match("!({$_ldl}{$al}block\s+)(name=)?(\w+|'.*'|\".*\")(\s*?)?((append|prepend|nocache)?(\s*)?(hide)?)?(\s*{$_rdl})!", $block_tag, $_match))
		{
			$error_text = 'Syntax Error in template "' . $template->source->filepath . '"   "' . htmlspecialchars($block_tag) . '" illegal options';
			throw new SmartyCompilerException($error_text);
		}
		else
		{
			$_name = trim($_match[3], '\'"');
			if ($_match[8] != 'hide' || isset($template->block_data[$_name]))
			{ // replace {$smarty.block.child}
				// get nested block tags
				if (0 != preg_match_all("!({$_ldl}{$al}block\s+)(name=)?(\w+|'.*'|\".*\")([\s\S]*?)(hide)?(\s*{$_rdl})([\s\S]*?)(.*)?({$_ldl}{$al}/block\s*{$_rdl})!", $block_content, $_match2))
				{
					foreach ($_match2[3] as $key => $name)
					{
						// get it's replacement
						$_name2 = trim($name, '\'"');
						if ($_match2[5][$key] != 'hide' || isset($template->block_data[$_name2]))
						{
							if (isset($template->block_data[$_name2]))
							{
								$replacement = $template->block_data[$_name2]['source'];
							}
							else
							{
								$replacement = '';
							}
							// replace {$smarty.block.child} tag
							if (preg_match("!{$_ldl}{$al}\\\$smarty\.block\.child\s*{$_rdl}!", $_match2[7][$key]))
							{
								$replacement = preg_replace("!({$_ldl}{$al}\\\$smarty\.block\.child\s*{$_rdl})!", $replacement, $_match2[7][$key]);
								$block_content = preg_replace("!(({$_ldl}{$al}block)(.*)?{$name}(.*)?({$_rdl}[\s\S]*?{$_ldl}{$al}/block\s*{$_rdl}))!", $replacement, $block_content);
							}
							if (preg_match("!{$_ldl}{$al}\\\$smarty\.block\.child\s*{$_rdl}!", $_match2[8][$key]))
							{
								$replacement = preg_replace("!{$_ldl}{$al}\\\$smarty\.block\.child\s*{$_rdl}!", $replacement, $_match2[8][$key]);
								$block_content = preg_replace("!(({$_ldl}{$al}block)(.*)?{$name}(.*)?({$_rdl})(.*)?({$_ldl}{$al}/block\s*{$_rdl}))!", $replacement, $block_content);
							}
						}
						else
						{
							// remove hidden blocks
							$block_content = preg_replace("!(({$_ldl}{$al}block)(.*)?{$name}(.*)?({$_rdl}[\s\S]*?{$_ldl}{$al}/block\s*{$_rdl}))!", '', $block_content);
						}
					}
				}
				// do we have not nested {$smart.block.child}
				if (0 != preg_match("!({$_ldl}{$al}\\\$smarty\.block\.child\s*{$_rdl})!", $block_content, $_match2))
				{
					// get child replacement for this block
					if (isset($template->block_data[$_name]))
					{
						$replacement = $template->block_data[$_name]['source'];
						unset($template->block_data[$_name]);
					}
					else
					{
						$replacement = '';
					}
					$block_content = preg_replace("!({$_ldl}{$al}\\\$smarty\.block\.child\s*{$_rdl})!", $replacement, $block_content);
				}
				if (isset($template->block_data[$_name]))
				{
					if (strpos($template->block_data[$_name]['source'], '%%%%SMARTY_PARENT%%%%') !== false)
					{
						$template->block_data[$_name]['source'] = str_replace('%%%%SMARTY_PARENT%%%%', $block_content, $template->block_data[$_name]['source']);
					}
					elseif ($template->block_data[$_name]['mode'] == 'prepend')
					{
						$template->block_data[$_name]['source'] .= $block_content;
					}
					elseif ($template->block_data[$_name]['mode'] == 'append')
					{
						$template->block_data[$_name]['source'] = $block_content . $template->block_data[$_name]['source'];
					}
				}
				else
				{
					$template->block_data[$_name]['source'] = $block_content;
					$template->block_data[$_name]['file'] = $filepath;
				}
				if ($_match[6] == 'append')
				{
					$template->block_data[$_name]['mode'] = 'append';
				}
				elseif ($_match[6] == 'prepend')
				{
					$template->block_data[$_name]['mode'] = 'prepend';
				}
				else
				{
					$template->block_data[$_name]['mode'] = 'replace';
				}
			}
		}
	}

	/**
	 * Compile saved child block source
	 *
	 * @param object $compiler compiler object
	 * @param string $_name    optional name of child block
	 *
	 * @return string   compiled code of schild block
	 */
	public static function compileChildBlock($compiler, $_name = null) {
		$_output = '';
		// if called by {$smarty.block.child} we must search the name of enclosing {block}
		if ($_name == null)
		{
			$stack_count = count($compiler->_tag_stack);
			while (--$stack_count >= 0)
			{
				if ($compiler->_tag_stack[$stack_count][0] == 'block')
				{
					$_name = trim($compiler->_tag_stack[$stack_count][1][0]['name'], "'\"");
					break;
				}
			}
			// flag that child is already compile by {$smarty.block.child} inclusion
			$compiler->template->block_data[$_name]['compiled'] = true;
		}
		if ($_name == null)
		{
			$compiler->trigger_template_error('{$smarty.block.child} used out of context', $compiler->lex->taglineno);
		}
		// undefined child?
		if (!isset($compiler->template->block_data[$_name]['source']))
		{
			return '';
		}
		$_tpl = new Smarty_Internal_template('string:' . $compiler->template->block_data[$_name]['source'], $compiler->smarty, $compiler->template, $compiler->template->cache_id, $compiler->template->compile_id = null, $compiler->template->caching, $compiler->template->cache_lifetime);
		$_tpl->variable_filters = $compiler->template->variable_filters;
		$_tpl->properties['nocache_hash'] = $compiler->template->properties['nocache_hash'];
		$_tpl->source->filepath = $compiler->template->block_data[$_name]['file'];
		$_tpl->allow_relative_path = true;
		if ($compiler->nocache)
		{
			$_tpl->compiler->forceNocache = 2;
		}
		else
		{
			$_tpl->compiler->forceNocache = 1;
		}
		$_tpl->compiler->suppressHeader = true;
		$_tpl->compiler->suppressTemplatePropertyHeader = true;
		$_tpl->compiler->suppressMergedTemplates = true;
		if (strpos($compiler->template->block_data[$_name]['source'], '%%%%SMARTY_PARENT%%%%') !== false)
		{
			$_output = str_replace('%%%%SMARTY_PARENT%%%%', $compiler->parser->current_buffer->to_smarty_php(), $_tpl->compiler->compileTemplate($_tpl));
		}
		elseif ($compiler->template->block_data[$_name]['mode'] == 'prepend')
		{
			$_output = $_tpl->compiler->compileTemplate($_tpl) . $compiler->parser->current_buffer->to_smarty_php();
		}
		elseif ($compiler->template->block_data[$_name]['mode'] == 'append')
		{
			$_output = $compiler->parser->current_buffer->to_smarty_php() . $_tpl->compiler->compileTemplate($_tpl);
		}
		elseif (!empty($compiler->template->block_data[$_name]))
		{
			$_output = $_tpl->compiler->compileTemplate($_tpl);
		}
		$compiler->template->properties['file_dependency'] = array_merge($compiler->template->properties['file_dependency'], $_tpl->properties['file_dependency']);
		$compiler->template->properties['function'] = array_merge($compiler->template->properties['function'], $_tpl->properties['function']);
		$compiler->merged_templates = array_merge($compiler->merged_templates, $_tpl->compiler->merged_templates);
		$compiler->template->variable_filters = $_tpl->variable_filters;
		if ($_tpl->has_nocache_code)
		{
			$compiler->template->has_nocache_code = true;
		}
		foreach ($_tpl->required_plugins as $key => $tmp1)
		{
			if ($compiler->nocache && $compiler->template->caching)
			{
				$code = 'nocache';
			}
			else
			{
				$code = $key;
			}
			foreach ($tmp1 as $name => $tmp)
			{
				foreach ($tmp as $type => $data)
				{
					$compiler->template->required_plugins[$code][$name][$type] = $data;
				}
			}
		}
		unset($_tpl);

		return $_output;
	}

}

/**
 * Smarty Internal Plugin Compile BlockClose Class
 *
 * @package    Smarty
 * @subpackage Compiler
 */
class Smarty_Internal_Compile_Blockclose extends Smarty_Internal_CompileBase {

	/**
	 * Compiles code for the {/block} tag
	 *
	 * @param array  $args     array with attributes from parser
	 * @param object $compiler compiler object
	 *
	 * @return string compiled code
	 */
	public function compile($args, $compiler) {
		$compiler->has_code = true;
		// check and get attributes
		$_attr = $this->getAttributes($compiler, $args);
		$saved_data = $this->closeTag($compiler, array('block'));
		$_name = trim($saved_data[0]['name'], "\"'");
		if (isset($compiler->template->block_data[$_name]) && !isset($compiler->template->block_data[$_name]['compiled']))
		{
			// restore to status before {block} tag as new subtemplate code of parent {block} is not needed
			// TODO: Below code was disabled in 3.1.8 because of problems with {include} in nested {block} tags in child templates
			//       combined with append/prepend or $smarty.block.parent
			//       For later versions it should be checked under which conditions it could run for optimisation
			//
			//$compiler->merged_templates = $saved_data[4];
			//$compiler->smarty->merged_templates_func = $saved_data[5];
			//$compiler->template->properties = $saved_data[6];
			//$compiler->template->has_nocache_code = $saved_data[7];
			$_output = Smarty_Internal_Compile_Block::compileChildBlock($compiler, $_name);
		}
		else
		{
			if (isset($saved_data[0]['hide']) && !isset($compiler->template->block_data[$_name]['source']))
			{
				$_output = '';
			}
			else
			{
				$_output = $compiler->parser->current_buffer->to_smarty_php();
			}
			unset($compiler->template->block_data[$_name]['compiled']);
		}
		// reset flags
		$compiler->parser->current_buffer = $saved_data[1];
		$compiler->nocache = $saved_data[2];
		$compiler->smarty->merge_compiled_includes = $saved_data[3];
		// reset flag for {block} tag
		$compiler->inheritance = false;
		// $_output content has already nocache code processed
		$compiler->suppressNocacheProcessing = true;

		return $_output;
	}

}

?>
